Key seat cutter,申请号US19530396654-传众专利搜索

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发明名称	Key seat cutter
摘要
申请公布号	US2821363(A)	申请公布日期	1958.01.28
申请号	US19530396654	申请日期	1953.12.07
申请人	SERVCO ENGINEERING, LTD.	发明人	JR. CHARLES O. VAN NOTE,
分类号	E21B10/26;E21B17/22;E21B31/107	主分类号	E21B10/26
代理机构		代理人
主权项
地址

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